Cwm, Llc reports 22.76% decrease in ownership of AMT / American Tower Corporation

American Tower Corporation

US ˙ NYSE ˙ US03027X1000

Security	AMT / American Tower Corporation
Institution	Cwm, Llc
Latest Disclosed Ownership	33,623 shares
Latest Disclosed Value	$ 5,802,580

On May 14, 2026 - Cwm, Llc filed a 13F-HR form disclosing ownership of 33,623 shares of American Tower Corporation (US:AMT) valued at $5,802,657 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 43,528 shares of American Tower Corporation. This represents a change in shares of -22.76% during the quarter. The current value of the position is $6,519,836 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)

File Date	Effective Date	Form	Security	Class	ID	Reported Shares	ΔShares	ΔShares (%)	Reported Value (x1000)	ΔValue (%)	Alloc (%)
2026-05-14	2026-03-31	13F	AMERICAN TOWER	COM	03027X100	33,623	-9,905	-22.76	5,803	82,785.71	0.0151
2026-01-26	2025-12-31	13F	AMERICAN TOWER CORP	COM	03027X100	43,528	27,567	172.71	8	133.33	0.0207
2025-10-15	2025-09-30	13F	AMERICAN TOWER CORP	COM	03027X100	15,961	-3,955	-19.86	3	-25.00	0.0092
2025-07-25	2025-06-30	13F	AMERICAN TOWER CORP	COM	03027X100	19,916	3,336	20.12	4	33.33	0.0155
2025-05-01	2025-03-31	13F	AMERICAN TOWER CORP	COM	03027X100	16,580	1,255	8.19	4	50.00	0.0144
2025-02-04	2024-12-31	13F	AMERICAN TOWER CORP	COM	03027X100	15,325	2,808	22.43	3	0.00	0.0117
2024-10-08	2024-09-30	13F	AMERICAN TOWER CORP	COM	03027X100	12,517	78	0.63	3	0.00	0.0125
2024-07-10	2024-06-30	13F	AMERICAN TOWER CORP	COM	03027X100	12,439	-389	-3.03	2	0.00	0.0114
2024-04-05	2024-03-31	13F	AMERICAN TOWER CORP	COM	03027X100	12,828	990	8.36	3	0.00	0.0123
2024-02-01	2023-12-31	13F	AMERICAN TOWER CORP	COM	03027X100	11,838	1,940	19.60	3	100.00	0.0137
2023-10-11	2023-09-30	13F	AMERICAN TOWER CORP	COM	03027X100	9,898	1,453	17.21	2	0.00	0.0100
2023-08-03	2023-06-30	13F	AMERICAN TOWER CORP	COM	03027X100	8,445	-19,625	-69.91	2	-80.00	0.0101
2023-05-01	2023-03-31	13F	AMERICAN TOWER CORP	COM	03027X100	28,070	1,823	6.95	6	0.00	0.0388
2023-02-01	2022-12-31	13F	AMERICAN TOWER CORP	COM	03027X100	26,247	-689	-2.56	6	-99.91	0.0410
2022-10-27	2022-09-30	13F	AMERICAN TOWER CORP	COM	03027X100	26,936	86	0.32	5,783	-15.74	0.0459
2022-07-28	2022-06-30	13F	AMERICAN TOWER CORP	COM	03027X100	26,850	1,947	7.82	6,863	9.70	0.0532
2022-04-21	2022-03-31	13F	AMERICAN TOWER CORP	COM	03027X100	24,903	19,087	328.18	6,256	267.78	0.0444
2022-01-31	2021-12-31	13F	AMERICAN TOWER CORP	COM	03027X100	5,816	1,953	50.56	1,701	63.09	0.0120
2021-09-15	2021-06-30	13F/A-1	AMERICAN TOWER CORP	COM	03027X100	3,863	0	0.00	1,043	0.00	0.0083
2021-07-29	2021-06-30	13F	AMERICAN TOWER CORP	COM	03027X100	3,863	0		1,043		0.0083
2021-09-15	2021-03-31	13F/A-1	AMERICAN TOWER CORP	COM	03027X100	3,863	0	0.00	1,043	0.00	0.0083
2021-04-27	2021-03-31	13F	AMERICAN TOWER CORP	COM	03027X100	3,879	16		927		0.0082
2021-09-15	2020-12-31	13F/A-1	AMERICAN TOWER CORP	COM	03027X100	3,863	0	0.00	1,043	0.00	0.0083
2021-01-27	2020-12-31	13F	AMERICAN TOWER CORP	COM	03027X100	2,912	-951		654		0.0061
2021-09-15	2020-09-30	13F/A-1	AMERICAN TOWER CORP	COM	03027X100	3,863	0	0.00	1,043	0.00	0.0083
2020-10-19	2020-09-30	13F	AMERICAN TOWER CORP	COM	03027X100	2,749	-1,114		665		0.0074
2021-09-15	2020-06-30	13F/A-1	AMERICAN TOWER CORP	COM	03027X100	3,863	0	0.00	1,043	0.00	0.0083
2020-07-22	2020-06-30	13F	AMERICAN TOWER CORP	COM	03027X100	2,104	-1,759		544		0.0065
2021-09-15	2020-03-31	13F/A-1	AMERICAN TOWER CORP	COM	03027X100	3,863	0	0.00	1,043	0.00	0.0083
2020-04-28	2020-03-31	13F	AMERICAN TOWER CORP	COM	03027X100	2,282	-1,581		497		0.0074
2021-09-14	2019-12-31	13F/A-1	AMERICAN TOWER CORP	COM	03027X100	3,863	0	0.00	1,043	0.00	0.0083
2020-01-27	2019-12-31	13F	AMERICAN TOWER CORP	COM	03027X100	2,610	-1,253		600		0.0077
2021-09-14	2019-09-30	13F/A-1	AMERICAN TOWER CORP	COM	03027X100	3,863	0	0.00	1,043	0.00	0.0083
2019-10-22	2019-09-30	13F	AMERICAN TOWER CORP	COM	03027X100	2,651	-1,212		586		0.0085
2021-09-14	2019-06-30	13F/A-1	AMERICAN TOWER CORP	COM	03027X100	3,863	0	0.00	1,043	0.00	0.0083
2019-07-31	2019-06-30	13F	AMERICAN TOWER CORP	COM	03027X100	70,362	66,499		14,385		0.2379
2021-09-02	2019-03-31	13F/A-1	AMERICAN TOWER CORP	COM	03027X100	3,863	-158,865	-97.63	1,043	-95.95	0.0083
2019-04-22	2019-03-31	13F	AMERICAN TOWER CORP	COM	03027X100	160,762	90,400		31,680		0.6354
2019-01-25	2018-12-31	13F	AMERICAN TOWER CORP	COM	03027X100	162,728	348	0.21	25,742	9.10	0.6428
2018-10-29	2018-09-30	13F	AMERICAN TOWER CORP	COM	03027X100	162,380	-2,857	-1.73	23,594	-0.96	0.6023
2018-07-31	2018-06-30	13F	AMERICAN TOWER CORP	COM	03027X100	165,237	41,468	33.50	23,822	32.43	0.7838
2018-04-26	2018-03-31	13F	AMERICAN TOWER CORP	COM	03027X100	123,769	123,300	26,289.98	17,989	26,749.25	0.7148
2018-01-16	2017-12-31	13F	AMERICAN TOWER CORP	COM	03027X100	469	75	19.04	67	24.07	0.0030
2017-10-16	2017-09-30	13F	AMERICAN TOWER CORP	COM	03027X100	394	334	556.67	54	575.00	0.0026
2017-07-17	2017-06-30	13F	AMERICAN TOWER CORP	COM	03027X100	60	-100	-62.50	8	-57.89	0.0004
2017-04-17	2017-03-31	13F	AMERICAN TOWER CORP	COM	03027X100	160	-36	-18.37	19	-9.52	0.0011
2017-01-19	2016-12-31	13F	AMERICAN TOWER CORP	COM	03027X100	196	-128	-39.51	21	-43.24	0.0013
2016-10-17	2016-09-30	13F	AMERICAN TOWER CORP	COM	03027X100	324	224	224.00	37	236.36	0.0026
2016-07-21	2016-06-30	13F	AMERICAN TOWER CORP	COM	03027X100	100	0	0.00	11	10.00	0.0008
2016-04-18	2016-03-31	13F	AMERICAN TOWER CORP	COM	03027X100	100	0	0.00	10	0.00	0.0009
2016-02-01	2015-12-31	13F	AMERICAN TOWER CORP	COM	03027X100	100	0	0.00	10	11.11	0.0010
2015-10-30	2015-09-30	13F	AMERICAN TOWER CORP	COM	03027X100	100	-1,033	-91.17	9	-90.00	0.0009
2014-02-14	2013-12-31	13F	AMERICAN TOWER CORP	COM	03027X100	1,133	0	0.00	90	7.14	0.0140
2013-11-14	2013-09-30	13F	AMERICAN TOWER CORP	COM	03027X100	1,133	1,133		84		0.0220

Legend

Shares: The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value: The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price: The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class: This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred

Allocation (%): The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation: The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%): The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis: The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss: This is the market value of the position as of the effective date minus the cost basis.